keystone

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(key-stone) 2 syllables

Definition

noun. 1 a central cohesive source of support and stability; 2 the central building block at the top of an arch or vault

Example Sentence

The keystone of his campaign was doing away with the income tax.

Synonyms

anchor; mainstay; backbone; linchpin; headstone

Antonyms

extraneous

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keystone
Hear It! Say It! Write It!

Rhymes

  • freestone
  • keystone